Boiler



' L.. HARTUNG. JR

' June 30, 193,1.

BOILER Filed July- 11. 1929 2 sneetsfshet l1 xxxxxyxxxxxxx June 3o, 1931. Y L. HAR'TUNG.JR f 1,812,094 l I BQILER Filed July 11. 1929 j 2 sheets-sheet 2` dw 3:/N 472193' ,37. 3.4. /f0/3 A TTORNE y PatentedJune 30, 1.931

' ing point'.

I e lUNITED",Sli-'13% TBS PATE

kLoUIsjiniizfruim, fire or KEABNYQNEWJERSEY 1 'ers off this style have numerous disadvan-V Due tothe thicknesslof thev walls oil tages. l the water chambers,j this beingimadejnecessaryon accountl of casting7 aff substantial amount of heat is absorbed by Vthese walls andwasted 'before'the Water reaches its boil@ This naturally results in an increased consumption ofk fuel. 'Due to the heavy wall construction, considerable time must elapserbefore heat.Y can Vbe produced,

particularly when the `boiler is cold. In extremely cold weather aiter'the fire has been forced anda head of steam raisedfthe furnace must be attended to 'at shorty intervals oi time to maintain the pressure. This is'both annoying and costly asjto'fuel consumption.

If the water .is not watched carefu'llyin a cast'iron boiler,randrbecomes too low, the

entire boiler or yone oi'k itsV sections vissoon ruined. vIt iswelljvknowngthat itis'expen siveand consumes: a substantial famount ofv f time to renew oneeof/ 'the 'sections in a cast ironboiler. 'j n -V ,Y t The objectzof the presentinvention l isvjto provide :a lon7 pressure boilery that will overcome the foregoingjfaults andhave'other additional advantages. f Y

the invention a casingV YIn accordance with is provided andr ajheating unit Vremovably mounted in the casing. The `lieatingunit Y comprises upper and lower drums, vCOI'lnected by a plurality o riser tubes.

Y risery tubes and the drums are welded.

' may be heated'to a boiling point very rapidf This construction permits. ofnuinerou's ad-VV vantages. TheA tubes and drums may be of extremely lightsection as compared tothe section of a cast iron boiler.` r Thus the water ly. Afterfthe water has reachedtheboiling point','the fire may be banked and the water will'be kept suicientlyhot 4to mainal complete section.

t One ofthe y most important features-ofthe inventionis that all joints or connections between the," y y n [line l--l of Fig. 2.;

iezao'lserialiio. 377,527. j I

of. Afuei'fwlii be veffected mid the? bther'rrf Y attending to the urnaceatshort intervals., will be eliminated.r j* f 'jl -With the welded constructionfall nutsan'd threaded connectionsjare' done away' with. `As a matter'of fact,y due" to the expansion and contraction of the drums and( tubes, yit `would beg highly impractical fmt vimp(testis-K' to j use threaded connections. Y Y Due to its lightness inweight-landfease of assemblying a boilerorl furnace 'of this naj.V ture, it maybequickly andeconoinically installed. f "A further decided'advantage residesjin the fact that thevheating unit may be easilyand particularly usefulv if the heating -unity b6 cornesworn' andit is desired ,tov installa new i rapidly removed from"itscasing.V This isV y 'onefor'if it is necessaryto make repairsjtoi` L any part of the unit. Ifa leak ldevelops or it becomes necessary ktorepair any partgzit may beV repaired quickly land .with va v1great deal less expense than in the cast irony boiler, whereit is necessary toremove and' replace 'The' ,boiler being c y t v 'ns i ma'deenti-rely of tubing,l A

lgreat Ystrength is obtained.y Even if a per,-

son should become, careless and allow the Y water tofall too'low, littleharm Willlbedone. f f

as compared to the cast 'iron' boiler."

` The Water` tube boilerof thepresentnnvention 'is particularly adapted'for'excellentv i` water circulation and rapid heat"stransmisff sion y l i i l Other obj ects and` advantages `will become apparent as this specification proceeds.l Referringpto the drawings `forming-al part Y thereof and infwhich apre-ferred form of th?. invention is illustrated g. i

Fig. 1 is a cross sectionaljview taken on removed Vfrom itsV casing and'v unit. ff; f

taken on longitudinal sectional Fig. 5g is aside elevationfofktlieifheating Y p tain the desiredhea-t. *Thus a great saving i lReferring again' to the drawings`-the side im. i

walls of the casing are designated by the reference numeral 10 and the front and rear walls by the numerals 12 and 13 respectively. The casing may be made of boiler plate or other suitable material and is secured to a flange on a base 14 by angles and bolts. The front and end walls 12 and 13 are secured in place in any suitable manner. As indicated in Figs. 2 and 3 angle irons and bolts are utilized for this purpose in addition to flanges on the front and rear of the base 14.

In the. preferred embodiment of the invention illustrated in the drawings, the base 14 has an inn-er peripheral flange 15 for supporting the heating unit hereinafter described. Formed on sidewalls of the base 14 below the flange 15 is a channelV 16 in which the grates 17 are mounted. rl`he area below the grates forms the ashpit of the furnace. It will be understood that the grates are provided with the usual form `of shaker handle and operating connections from said handle to the grates. As such constructions are well known it is not thought necessary to illustrate same.

The front wall of the base is provided with the usual ashpit door 18 and the front wall of the casing has a re door 19 and cleanout door 20. If oil were being used for fuel instead of coal, naturally the grates would be removed. The upper part of the rear wall is provided with the usual discharge 21 to the chimney or stack. The details of construction, shape and arrangement of parts of the casing and its base may be widely varied.

The Aheating unit comprises an upper drum or header 25. Its ends 26 are slabbed off as indicated in Figs. 2 and 5. The ends 26 are formed of plates which are welded at 27 to the drum 25. The slabbed off ends permit of a free passage. of the heat in that the space between the upper part of the header and the end walls is substantially increased. The lower part of the header extends substantially the length of the furnace and allows ample room for a large number of riser tubes and thus provides an increased heating surface.

Theheader 25 has a plurality of outlets from its upper side. The connection 28 may lead to the safety valve and gauge glass and connections 29 may lead to the radiators or apparatus which is to be supplied with steam. Any suitable number of connections 29 may be provided depending upon the size of the heating plant. The outlets 28 and 29 are provided with couplings 3() which are loosened when it is desired to remove the heating unit from the casing.

The lower drum 31 of the heating unit is of smaller diameter. It rests adjacent the side and end walls of the furnace and is supported on the flange 15 of the base 14.

" In the form illustrated in the drawings this lower drum is rectangular and surrounds the fire lip of the furnace. It may be constructed of four lengths of pipe, each length being mitered at ends and the mitered joints welded at 31a. The flange 15 supports it above the grates and thus substantially its whole area is exposed in the active heat zone of the furnace. If desired, the flange 15 need not be continuous.

The forward part of the lower drum 31 maybe provided with removable cleanout plugs 32 and the rear part with connections `@ne of the connections 33 may lead from the water supply and the other from the heating system.

The upper drum 25 and the sideportions of the lower drum 31 are connected by a plurality of riser tubes. As illustrated, there are two rows 34 and 35 of these tubes on either side of the heating unit. These tubes are welded at 36 to the upper drum and at 37 to the lower drum. The tubes in each row are staggered in relation to each other. It is important to have the riser tubes connected to the lower part of the drum 25 so as to insure their ends being covered with water. The foregoing arrangement of riser tubes provides a maximum number of tubes in the most efiicient heating areaV of the furnace.

In order to greatly increase the heating surface auxiliary headers 38 are positioned at the front and rear of the heating unit. The end closures of the auxiliary headers are welded to the ends of the headers at 38a. These auxiliary headers are. connected to the upper drum 25 by short riser tubes 39 welded at 40 to the headers 38 and at 41 to the drum 25. A pair of riser tubes 42 connect the front auxiliary header 38 with f` the forward part'of the lower header 31 and are welded at 43 to the auxiliary'header and lower drum. The riser tubes 42 are spaced apart sufficiently to allow ample room for the fuel vto be fed from the fire door 19. filo The rear auxiliary header 38 is connected to the rear part of the drum 31 by a plurality of riser tubes 44 welded at 45 to the auxiliary header and lower drum. If oil were being'used for fuel, the arrangements of auxiliary headers and riser tubes might be alike at both ends.

From the foregoing it will be apparent that an efiicient heating unit is provided and one in which all the connections or joints are welded. Either the front or rear walls 12 or 13 may be taken off and the entire heating unit easily and quickly removed from its casing.

Resting on angles 46 welded to the upper drum and other angles 47 secured to the casing are removable baffle plates 48. The baffle plates 48 direct a substantial amount of the heat over the top of the drum 25 before leaving the discharge 21.

.The Vinside of vthe casing and front and rear walls may be 4lined with asbestos-v49 or other suitable heat insulating material.

It is' preferable to use seamless tubing throughout the construction of the heating unit. Due to thev great strength of such tubing and its Welded oints, an extremely light section of metal 'is permissible. Thus as the heat is generated vin the fire rbox and passes through the casing and heating unit the f y most eiicient results are'obtained. A Lgreat saving in fuel consumption is effected and considerable time and effort saved 1n caring for the furnace. Due to the greater factor of safety over the castiron boilers al lower rate ofiinsurance also prevails. y Many changes in details of construction and arrangements of parts may be made by one skilled in the art and all such changes casing and another drum'y lying in proximity to the end walls and yside walls of said casingy at the lower part thereof, said lower drum having side portions and front andy back portions, rowsof riser tubes connecting ,the side portions of said lower drum to sai upper drum and auxiliary headers or drums atthe front and rear of said heating unit, saidauXilia-ry headersor drums having connections rto said upper and lower drums, all l the'joints inl said'heatinv unit being welded. In testimony whereof' aiix my s1 nature. f LOUIS 'HARTUN l, JR.y

are tov be considered` as coming within the the appended claims. f I claim:

purview of the invention and the scope of 1.r A device of the charactery described hav- 'p i I ing incombination, a ysubstantially rectan-v gular casing, and a heating unit removably mounted in said casing, said heating unit comprising an upper drum of substantially large diameter located inthe upper part of said casing, said upper drum having its ends slabbed off to substantially increase the space Vbetween the upper part of said upper drum Yand the endwalls of said casing for the free passage of the-heat, and lower-drum of smaller `diameter supported adjacent the walls of said casing, said drums being connected by a plurality of riser tubes, all the connections between said riser tubes and said drums being welded.

2. A device of the character described havl ing in combination, a substantially rectangular casing, aheating unit removably mounty ed in said casing, said heating unit comprisi ing an upper drum of substantially large diameter located in the upper part of said casing, said upper drum having its ends Y to substantially increase the lspace Y slabbed off between theupper part ofsaid upper drum ,i

and theend walls of said casingfor the free passage `.of .the'heat, anda lower drum of smaller diameter Vsupported adjacent the Y walls of saidcasing, said drumslbeing connected by aplurality of riser tubes, all the j connections between said'riser tubes andsaid drums being welded, andremovable bafes Vbetween the sides :ofv said upper drum and the side walls of said casing todirect the y heat over said upper drum;

3. Adeviceof'the characterdescribed'having-in Acombination -a ,substantiallyy rectangu- V lar-casinga b'ase,-supports onthe walls of saidjbase, and-Ia heating unit removably Y mounted in said`v casingv on said supports, said heating unit comprising a longitudinally extending drum in the upper part of said geo' l 

